WTJP33 RJTD 222100 WARNING 222100. WARNING VALID 232100. STORM WARNING. SEVERE TROPICAL STORM 1609 MINDULLE (1609) 992 HPA AT 42.3N 142.6E NORTHERN JAPAN MOVING NORTHNORTHEAST 36 KNOTS. POSITION GOOD. MAX WINDS 50 KNOTS. RADIUS OF OVER 30 KNOT WINDS 130 MILES EAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 230900UTC AT 49.8N 146.4E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 50 KNOTS. BECOMING EXTRATROPICAL LOW. FORECAST POSITION FOR 232100UTC AT 56.7N 148.1E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 45 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=